KR20090116658A - Treatment system for ballast water - Google Patents

Abstract

PURPOSE: A ballast water treatment system is provided to reduce ballast water processing cost with inexpensive initial installation cost, and to prevent environmental contamination. CONSTITUTION: A ballast water treatment system includes a ballast inlet(910), a ballast electrolysis disinfection module(400), a rectifier(700), a controller, a ballast tank(800), a TRO neutralizer(500), and a ballast exhausting part(920). The ballast electrolysis disinfection module disinfects transferred ballast water. The rectifier supplies DC power to the electrolysis disinfection module. The control part includes a TRO measuring sensor(320), a gas sensor(310), a conductivity sensor(330), a water leakage sensor(600), the rectifier, a heat-exchanger, and the TRO neutralizer.

Description

Ballast Water Treatment System {Treatment System for Ballast Water}

The present invention relates to a ballast water treatment system, the present invention is a ballast inlet for introducing the ballast water from the outside, a ballast water electrolytic sterilization module for electrolytic disinfection of the ballast water introduced through the ballast inlet, the electrolytic sterilization module direct current Diagnosis and control operation of ballast water electrolysis or neutralization process through rectifier, TRO measuring instrument, gas sensor, conductivity sensor or leakage sensor that supplies power, and ballast for storing electrolyzed ballast water through the electrolytic disinfection module A ballast for discharging the ballast water neutralized through the TRO neutralizer and the TRO neutralizer to neutralize the TRO of the ballast water to a neutralizing liquid when the TRO value measured by the TRO measuring instrument is greater than a predetermined value when discharging the tank and the ballast water. It comprises an outlet.

In general, ships carrying cargo at sea are to be sailed in the ship's full condition, and after unloading the cargo, maintaining the balance of the ship on the ship. To this end, the ship enters the ballast water into the ballast tank in the ship and sails.

With the recent trend of larger ships, the amount of ballast water has gradually increased, so that ballast water from at least thousands of tons to more than tens of thousands of tons is introduced into the ship. The incoming ballast water moves with other ships to other countries or regions, and a large amount of ballast water is discharged during the cargo loading process. In the process of releasing ballast water, seawater from other regions may be mixed, and there is a problem that fine marine life is also spread to other regions. This spread of ballast water can destroy marine ecosystems and cause aquatic species, waterborne diseases, and red tide, which require regulatory legislation. In response, the International Maritime Organization (IMO) and US Federal Law, etc., have established a range of regulatory legislation to preserve marine ecosystems and safe discharge of ballast water.

Research on the method and apparatus for treating ballast water has been conducted in various countries such as Korea, USA, Europe and Japan, and depending on the treatment method, filter + cavitation + ozone method, filter + chlorine injection method, centrifugation + filter + ferra Clean (acetic acid disinfectant) injection method, filter + ultraviolet sterilization method, ozone injection method, filter + anoxic + cavitation is introduced.

Similarly to the present invention, a method or apparatus applying electrolysis to ballast water treatment is as follows. Korean Patent Application No. 10-2003-0094867 "electrolytic ballast water treatment method and treatment device using sodium hypochlorite" is a technology for electrolytic treatment of ballast water in the ballast water tank using sodium hypochlorite, domestic patent Application No. 10-2006-0100055 "Ship ballast water sterilization apparatus using a bipolar electrolysis system" is a technology that includes an electrolytic sterilizer and a circulation pump for forced circulation in the ballast tank, domestic patent application No. 10 "Electrolytic ballast water treatment method and treatment apparatus" of 2005-0303163 is a method of treating ballast water through a method of converting NaCl contained in seawater into NaClO and supplying it to a ballast tank.

However, since the conventional technique adopts an indirect disinfection method in which sodium hypochlorite is produced and injected into the ballast water, rather than electrolytically disinfecting the ballast water as a whole, sodium hypochlorite, generated radicals, potential difference, and acid at the electrode surface. It is difficult to expect the effect of complex disinfection by electrochemical reactions pursued by related technologies such as protein denaturation by alkaline, and in the structure of attaching electrolytic sterilizer directly to the ballast tank and forcibly circulating it, electrolytic sterilization according to the capacity of ballast water The device and the device that forcedly circulate it also have to be large, which has disadvantages of low energy efficiency along with space problem.

In addition, the prior art concentrates only on the method of disinfecting the ballast water, there is a problem that can disturb or destroy the marine ecosystem by discharging the TRO contained in the disinfected ballast water to the outside, that is, the sea.

Conventional insoluble electrode manufacturing technology uses platinum group electrolytic metals such as Ir, Ru, Pt, and Pd as main coating agents, and is manufactured using Ta, Ti, Nb, Sn, etc. as additives, and is suitable for electrolysis in ballast water. There are no specialized electrode coatings and additives. The current applying unit for applying the current is not 1: 1 with the electrode reaction unit, so that the loss portion of the current due to the resistance is generated, and the current distribution may be biased, which may cause the efficiency and durability to be degraded.

The present invention relates to a ballast water treatment system in which the conventional method for treating ballast water is improved, and the total amount of ballast water flowing into a vessel is passed through an electrolytic sterilization module to generate radicals, potential differences, and acid / alkaliation at the electrode surface. Not only can instantaneous sterilization effect be obtained by protein denaturation, but also continuous sterilization effect by the produced TRO. However, since the generated TRO may be discharged to the outside of the ship to contaminate seawater or fresh water, an object of the present invention is to provide a ballast water treatment system that neutralizes ballast water containing a certain level of TRO with a neutralizing liquid of a TRO neutralizer.

In addition, the present invention is to apply a coating material Ru and Ti suitable for the electrolysis of ballast water treatment to Ti material to heat the high temperature heat treatment to clear the crack pattern to induce a specific surface area and to increase the TRO (Total Residual Oxidant) generating activity Have

The present invention relates to a ballast water treatment system, the ballast inlet for introducing the ballast water from the outside; A ballast water electrolytic disinfection module for electrolytic disinfecting ballast water introduced through the ballast inlet; A rectifier for supplying DC power to the electrolytic sterilization module; A control unit for diagnosing ballast water electrolysis or neutralization and controlling operation of the system through signals received from a TRO measuring instrument, a gas sensor, a conductivity sensor, and a leak sensor; A ballast tank storing ballast water electrolyzed through the electrolytic sterilization module; A TRO neutralizer for neutralizing the TRO of the ballast water with a neutralizing liquid when the TRO value measured by the TRO measuring instrument is greater than a predetermined value when discharging the ballast water; And a ballast discharge part for discharging the ballast water neutralized through the TRO neutralizer to the outside, wherein the electrode form in the electrolytic disinfection module has a mesh shape and a plate-shaped electrode reaction part and a plate at one end of the electrode reaction part. Consists of a welded terminal portion and one-to-one matching with the current applying portion by this effect, the electrode is a sanding process to ensure a uniform roughness of titanium, an etching process to remove contaminants on the surface, The coating and drying process of the electrode composition is repeated several times, and the final firing (Aneealing or Cancilation) process is performed by injecting oxygen at a temperature range of 550 ~ 650 ℃ in the range of 1 ~ 10L / min for 1 hour. It is characterized by the above-mentioned heat-firing.

In addition, when preparing the composition constituting the electrode, RuCl ₃ is used as the main coating agent, TiCl ₄ is used as an additive, butanol is used as the solvent, the composition ratio before dissolving in the solvent is 30 to 50%, the additive It is characterized in that the configuration in the 50 ~ 70% range.

In this case, the amount of input current is controlled by the conductivity of the ballast water flowing in the initial operating conditions of the electrolytic sterilization module.

In addition, the rectifier is to remove the scale generated on the electrode automatically by performing a periodic polarity switching, the polarity switching period of the rectifier is characterized in that less than 5 minutes.

In addition, the electrolytic sterilization module is automatically adjusted so that the ballast water passing through the electrolytic sterilization module is maintained at 10 mg / l, which is measured by a TRO meter, and the TRO concentration of the ballast water passing through the electrolytic sterilization module is 8 mg / l. To 12 mg / L.

In addition, the TRO neutralizer is provided with a neutralization tank, characterized in that it comprises a water level control sensor and a temperature control sensor for adjusting the water level and temperature of the neutralized liquid mixed with fresh water and neutralizing material.

In this case, the TRO neutralizer supplies a neutralizing solution heated by a heater while mixing and stirring fresh water and a neutralizing material, and heats the neutralizing liquid in a temperature range of 25 ° C. to 40 ° C. with the heater of the TRO neutralizer. do.

In addition, the neutralizing material is characterized in that at least one of sodium thiosulfate (Na ₂ S ₂ O ₃ , sodium thiosulfate), acidic sodium sulfite (NaHSO ₄ , sodium bisulfate), or sulfite (sulfite).

In addition, the TRO neutralizer is characterized in that the neutralization liquid is supplied to the ballast water so that the TRO concentration of the discharged ballast water is maintained to 0.02mg / L or less.

The ballast water treatment system provided through the present invention is an economical method of treating ballast water by applying the electrochemical principle of electrolysis, which is another method of ballast water treatment technology: filter + cavitation + ozone method, filter + chlorine input method. In addition to the technology of centrifugal separation + filter + peracrine (acetic acid disinfectant), filter + ultraviolet sterilization method, ozone injection method, filter + anoxic + cavitation, the footprint and the initial installation cost and operating cost is low In terms of environmental aspects, the TRO present in the ballast water is neutralized and discharged to the outside of the ship to protect the marine ecosystem.

Hereinafter will be described in detail for the practice of the present invention.

1 is a view that the ballast water flows into the ballast tank of the ship after the ballast water is disinfected through the electrolytic sterilization module, Figure 2a is a flowchart for determining the abnormality in the machine, apparatus for operation, before operating the ballast electrolytic sterilization module, 2B is a flowchart illustrating a process in which ballast water flows into and disinfects the ballast electrolytic disinfection module, and FIG. 3 is a view illustrating a process of neutralizing TRO of the ballast water and discharging it to the outside of the ship, and FIG. 4A is a proper temperature of the TRO neutralizer. 4 is a flowchart illustrating a process for maintaining the temperature, FIG. 4B is a flowchart illustrating a process of neutralizing the barrel water containing TRO with the neutralizing liquid supplied from the TRO neutralizer, and FIG. 5 is a TRO for neutralizing the TRO of the ballast water. 6A and 6B are diagrams illustrating a circuit diagram of a rectifier of a drawing showing an electrode module structure according to the present invention.

"TRO" used in the present invention is an abbreviation of "Total Residual Oxidant" and means the total residual oxidant present in the ballast water, and chlorine generated through the electrolysis process is usually used to oxidize the aquatic organisms in the ballast water. Obtain and calculate the residual chlorine level which is chlorine. In case of electrolysis or chlorination of seawater or salty water, "TRO" is replaced with atoms such as bromine instead of active chlorine atom, so that various kinds of oxidants coexist. The active oxidant is also called "TRO".

Ballast water treatment system according to the present invention is the ballast inlet 910, ballast electrolytic disinfection module 400, rectifier 700, control unit 100, 200, ballast tank 800, TRO neutralizer 500 and ballast discharge The unit 920 is included.

In the present invention, the ballast inlet 910 is where the sea water or fresh water flows into the vessel. The inflow method typically passes through the strainer after opening the sea chest, removes coarse contaminants, and operates a ballast pump (not shown) to allow the ballast water to flow into the vessel from the outside.

The ballast water supplied through the ballast inlet 910 passes through the electrolytic disinfection module 400, disinfects microorganisms, aquatic organisms, and coliforms present in the ballast water, while the bacteria and ballast tanks are introduced through the atmosphere. The organisms remaining at (800) are also inactivated by TRO. Unlike the conventional ballast electrolytic sterilization technology, the electrolytic sterilization module 400 according to the present invention electrolyzes the total amount of ballast water flowing into a ship.

More detailed description of the electrolysis is as follows. First, when a current is applied to the electrode, radicals are generated. Radicals generated through the electrolytic sterilization module include hydroxyl radical (OH), hydroperoxy radical (HOO), superoxide radical (O ₂ ⁻ ), and hydrogen peroxide (H ₂ O ₂ ). The generated radicals exist for a very short time, while sterilizing and disinfecting aquatic organisms, while being a powerful oxidant, they have an excellent ability to oxidatively decompose pollutants.

In addition, the electrolytic sterilization module of the present invention can instantaneously sterilize marine microorganisms using a potential difference. When the microorganisms are exposed to the electric field, micropores are formed in the cell membrane, and the electrolyzed water is introduced into the microorganism body by osmotic pressure through the micropores, thereby expanding the cells. When the expanded cells reach the critical point, the cell membrane bursts and dies (“hemolysis”), which occurs in a very short time.

In addition, the area around the anode is strongly acidified, and the area around the cathode is strongly alkaline, and at the anode, the organism is killed by protein denaturation of the cell, while at the cathode, the organism is killed by interfering with inorganic ion transport.

On the other hand, ballast water is generally seawater because most of the areas in which the ship operates are oceans. Seawater is rich in sodium chloride, and TRO is generated during electrolysis. TRO may vary depending on residence time, input power, material of electrode, etc. in ballast water electrode. Since the generated TRO remains in the ballast tank 800, it inhibits the propagation of bacteria introduced from the atmosphere during the voyage period and serves to inactivate the organisms remaining in the ballast tank 800.

In the prior art, only a portion of the ballast water is electrolyzed, and most of the methods are used for disinfecting electrolyzed using only residual chlorine having a sustained power when disintegrating the ballast water into the main ballast water stream. However, the ballast water treatment system according to the present invention can be expected to have a complex disinfection effect obtained by the electrolysis of the entire ballast water as well as the disinfection by residual chlorine, as well as the instantaneous disinfection effect by radical, acid alkali and potential difference.

As described above, the present invention has a feature that can be easily inactivated even if the organism is resistant to a single disinfection mechanism because a variety of disinfection mechanisms appear in a single process.

On the other hand, a large amount of inorganic ions are present in the sea water, and converted to inorganic salts in the electrolytic decomposition process to generate scale on the electrode. The scale generated in this way can be detached while periodically changing the polarity of the electrode. Electrodes that change periodically increase the size of the electric field to enhance disinfection by the potential difference.

Hereinafter, the ballast electrolytic disinfection module 400 according to the present invention will be described in more detail.

First, an electrode module which is a main component of the electrolytic disinfection module 400 is as shown in FIGS. 6A and 6B.

The electrode according to the present invention is in the form of a plate, a mesh, the terminal for applying the current is welded in a plate-shaped throughout the electrode so that the flow of current is evenly applied to the entire reaction portion (electrode, 410). That is, the electrode shape is configured by one-to-one matching of the electrode reaction portion 410 of the mesh-shaped plate and the current applying portion 420 welded to form a plate form at one end of the electrode reaction portion 410. In this case, a plate-shaped electrode module fastening part 430 is formed at the other end of the current applying part 420.

Hereinafter, an embodiment of manufacturing an electrode having the above structure will be described.

First, a process of securing a uniform roughness by sanding titanium, which is an electrode material, and an etching process of removing contaminants on the surface are coated and dried several times, followed by annealing or cancilation. The material coated with the thickness is finally injected with a certain amount (1 ~ 10L / min) of oxygen at 550 ~ 650 ℃, and it is heated for more than 1 hour to complete the electrode.

In the electrode composition manufacturing process, it is preferable to use Ru as a main coating agent, Ti as an additive, and dissolve in butanol, ethanol, and isopropyl alcohol. More preferably, RuCl ₃ as Ti, TiCl ₄ as Ti and butanol as a solvent are suitable, and the composition ratio before dissolving in a solvent is in the range of 30 to 50% of the main coating agent and 50 to 70% of the additive. It becomes suitable.

In the drying and coating process, the etched electrode material includes a process of completely drying moisture at a temperature range of 80 to 150 ° C. and applying transition metals and additives using brushing, rolling, dipping, or spraying.

The coating material is Pt, Ir, Ru, Os, Rh, Pd and additives Ta, Ti, Nb, Sn, etc. as the main catalyst for the preparation of precursor The best results for seawater Ru 30 ~ 50%, Ti 50 ~ 70 % Is the best.

Experimental values for the electrode produced as described above are as follows.

The current efficiency was measured by constant current experiment in NaCl 30 ‰, electrolysis time was 60 seconds, current density was 0.08A / cm ₂ and electrode spacing was 0.7cm. .

Table 1: TRO generation efficiency in 30 ‰ seawater

Composition Experiment No Main coating Transition metal Current efficiency (%) Ir Ru Pt Ta Ti One 50% 50% 52 2 50% 50% 48 3 50% 50% 62 4 50% 50% 68 5 50% 50% 54 6 50% 50% 53 7 20% 80% 62 8 30% 70% 73 9 40% 60% 72 10 50% 50% 68 11 60% 40% 67

TRO according to the present invention is deposited in the ballast tank 800 is gradually reduced over time, but if the navigation distance is short may be discharged in a state that is not sufficiently reduced. When TRO is discharged to the ocean at high concentrations, it can destroy marine organisms and disrupt marine ecosystems, so lowering TRO concentrations is of paramount importance when discharging ballast water out of the vessel. To this end, the TRO is neutralized using a TRO neutralizer described later.

The ballast water treatment system according to the present invention includes a rectifier for converting alternating current into direct current and supplying the electrolytic disinfection module 400. Here, although represented as a rectifier, it is represented by a rectifier in the drawing, hereinafter, an identification number for the rectifier will be referred to as 700.

In the present invention, the rectifier 700 receives an AC voltage, that is, AC from the power supply, and converts the AC voltage into DC DC voltage. The rectifier 700 also has a timer function to periodically change the polarity of the electrolytic disinfection module 400. The polar switching cycle is correlated with the scale generation amount, but is preferably within 5 minutes, more preferably 30 to 60 seconds.

By periodically changing the polarity of the electrode in the rectifier 700 of the present invention, it is possible to detach the scale attached to the electrode. As described above, if the polarity of the electrode is periodically changed in the rectifying unit 700, the disinfection effect due to the potential difference may be further increased by increasing the size of the electric field.

In the present invention, a heat exchanger may be provided to cool the heat of the rectifier 700. The heat exchanger uses coolant as the primary coolant and can exchange heat using seawater as the secondary coolant. For stable operation of the heat exchanger, the heat exchanger is equipped with a temperature sensor and a pressure sensor.

It is also possible to cool the cooling water as the primary coolant with seawater as the secondary coolant. When the temperature of the coolant exceeds the limit temperature, the ballast water treatment system is automatically stopped. The aluminum radiator of the rectifier includes a coolant circulation tube therein, and when the coolant passes through the circulation tube, heat is released and the heated coolant is circulated back to the heat exchanger.

The ballast water treatment system according to the present invention controls the present treatment system as a whole through a control unit (RTU, Remote Terminal Unit, 200). In the present invention, the control unit controls the rectifier 700, heat exchanger (not shown), TRO neutralizer 500 in addition to the TRO measurement sensor 320, gas sensor 310, conductivity sensor, water leakage sensor 600.

In the present invention, the TRO measuring device measures the TRO concentration of the ballast water passing through the ballast water electrolysis sterilization module. Ballast water The ballast water sterilized in the electrolytic sterilization module is continuously measured to maintain the TRO concentration within a certain range.

If the TRO concentration of the ballast water passing through the electrolytic sterilization module is below the minimum value within the numerical range, increase the current value of the ballast water electrolytic sterilization module to increase the TRO concentration, and if it is above the maximum value within the numerical range, decrease the current value to reduce the TRO concentration. Drive.

In the present invention, the gas sensor detects H ₂ , Cl ₂ gas generated when seawater is electrolyzed in the electrolytic sterilization module of the ballast water treatment system. When the H ₂ and Cl ₂ gas generated in the electrolytic sterilization module is collected in a gas cylinder and is above a predetermined pressure, the H ₂ and Cl ₂ gas may be automatically discharged to the outside of the ballast water treatment system according to the present invention.

In the present invention, the conductivity sensor 330 measures the conductivity to determine the initial rectification conditions. Since the TRO concentration is determined according to the amount of current supplied to the electrolytic disinfection module 400 during operation of the ballast water treatment system according to the present invention, the TRO concentration may be adjusted by adjusting the conductivity sensor 330. The signal detected by the conductivity sensor 330 is received through the controller 200.

In the present invention, the water leak sensor 600 may generate a signal to stop the operation when the ballast water leaks when the ballast water treatment system according to the present invention is running.

The controller 200 controls the overall ballast water treatment system for the signals received from the above-described TRO measuring instrument, gas sensor, conductivity sensor, leak sensor, and the like. In addition, GPS information, heat exchanger information, rectifier operation information, and the like are also collected through the control unit to diagnose the ballast water electrolysis or neutralization state and control the operation.

The sterilized ballast water passing through the ballast water electrolytic disinfection module 400 flows into the ballast tank 800 of the ship. In this case, the amount of ballast water in the ballast tank 800 is different depending on the size of the ship and the amount of cargo.

When discharging the ballast water in the ballast tank 800, the TRO concentration may adversely affect the marine ecosystem. Technical features of the ballast water treatment system according to the present invention includes a TRO neutralizer for measuring the TRO concentration of the sterilized ballast water to neutralize the TRO with a neutralizing liquid before discharge to the outside of the vessel.

Preferred neutralizing materials used in the present invention are at least one of sodium thiosulfate (Na ₂ S ₂ O ₃ , sodium thiosulfate), acidic sodium sulfite (NaHSO ₄ , sodium bisulfate), or sulfite. The neutralization liquid is supplied to the ballast water from the TRO neutralizer.

In the present invention, the TRO neutralizer 500 is provided with a neutralization tank, and supplies a neutralization liquid mixed with fresh water 930 and a neutralization material 920. The neutralization tank is provided with a level control sensor 340 capable of automatically adjusting the level of the neutralizing liquid to maintain the neutralized liquid at a constant level, and equipped with a temperature control sensor to maintain the neutralized liquid at a constant temperature.

In addition, in order to quickly mix the neutralizing material, the neutralizing liquid mixed with the neutralizing material and the fresh water in the neutralization tank is stirred and heated by the heater 910.

If the TRO concentration of the ballast water is measured before the neutralization liquid is supplied from the TRO neutralizer 500, and the TRO concentration is less than the minimum value within the numerical range, the TRO neutralizer 500 reduces the amount of neutralized liquid supplied, Lower the TRO concentration by increasing the supply of neutralizing fluid. The neutralization liquid supplied through the TRO neutralizer 500 neutralizes the TRO and automatically controls the TRO concentration to be discharged below the discharge allowance.

In order to operate the ballast water electrolytic disinfection module 400 in the present invention, the power of the switchgear, rectifier 700, heat exchanger, remote terminal (RTU, 200), TRO measuring instrument having a TRO sensor 320, gas sensor 310, the conductivity (conductivity) sensor 330, the leak sensor indicator 600 and the like self-diagnose. If each device is intact, the ballast pumps are operated and the devices are operated together.

According to the operation of the ballast pump, the ballast water electrolytic disinfection module 400 disinfects the incoming seawater, and the TRO value of the sterilized ballast water is measured using a TRO sensor 320 which is a TRO measuring instrument.

The ballast water treatment system according to the present invention operates by automatically adjusting the amount of current by the TRO measurement value so that the TRO concentration of the electrolytic sterilized ballast water is maintained at 10 mg / l. However, if the TRO concentration of the electrolytic sterilized ballast water is 12 mg / l or more, it is determined that excessive electrolytic disinfection is occurring and an alarm sounds. If the TRO concentration is 14 mg / l or more, the electrolytic sterilization module automatically stops to rectifier, various sensors, Check the machinery, devices and modules for failures and repair them.

In the present invention, even when the TRO of the electrolytic sterilized ballast water is 8 mg / l or less, it is determined that the electrolytic disinfection is insufficient, and an alarm is sounded. Check the device or module for failure and repair it.

In addition, it receives alarm information such as leak sensor, H ₂ Cl ₂ gas sensor, coolant shortage sensor, real-time monitoring sensor, and if the alarm level is high, an alarm sounds and the electrolytic disinfection module is automatically stopped to break down the rectifier, various sensors, machines, devices, and modules. Check the status and repair it.

The electrolytic sterilized ballast water TRO continues to electrolyze the ballast water if all devices and sensors operate normally at 6 mg / l to 14 mg / l. More preferably, the TRO concentration of the electrolytic sterilized ballast water is maintained in the range of 8 mg / L to 12 mg / L.

In the present invention, the TRO neutralizer 500 is provided to neutralize the ballast water. In the present invention, the neutralizing material is mixed with fresh water 930 in the neutralization tank of the TRO neutralizer 500 and stirred to make a neutralized liquid, which is stirred while heating the neutralized liquid with the heater 910. The neutralization liquid of the TRO neutralizer 500 is preferably maintained at 25 ° C to 40 ° C, more preferably at 27 ° C to 35 ° C, and most preferably at 30 ° C.

The neutralized liquid heated in the TRO neutralizer 500 is supplied to the ballast water to neutralize the TRO chlorine. If the TRO of ballast water after neutralization exceeds 2 mg / l, the neutralization liquid is increased. If the TRO of ballast water after neutralization is 0.02 mg / l, the neutralization liquid is reduced. In the TRO neutralizer 500 for supplying the neutralizing liquid, the level of the neutralizing liquid is sensed using the water level control sensor 340. When the level is low, the fresh water 930 is supplied and the neutralizing material 920 is mixed.

As described above, the neutralizing material 920 used in the TRO neutralizer 500 is sodium thiosulfate (Na ₂ S ₂ O ₃ , sodium thiosulfate), sodium sulfite (NaHSO ₄ , sodium bisulfate), or sulfite (sulfite). Use at least one of

The rectifier circuit according to the present invention is a general circuit, in the ballast water treatment system according to the present invention, in order to supply a direct current power supply to the electrolytic disinfection module, and a small direct current power supply for electrolysis, the rectifier is a transformer and a converter. It includes. The detailed description of the circuit is general and will not be described further.

7 is a graph showing the input amount of the neutralization solution automatically corresponding to the change in the TRO concentration, Figure 8 is a graph of the increase in the input amount of the neutralizing solution as the TRO concentration increases.

As can be seen from the graph of FIG. 7, when the TRO concentration changes, it can be seen that the amount of neutralizing solution for neutralizing the TRO changes in the same manner. During neutralization, each valve opening of each ballast tank adds a maximum of neutralizing solution based on 8 ppm concentration and rapidly reduces the amount of neutralizing solution to match the TRO concentration. The concentration of the neutralizing solution of FIGS. 7 and 8 is based on the concentration of 16.8 Kg neutralizing agent dissolved in 100 liter of neutralizing solution.

8 shows that as the concentration of TRO increases, the amount of neutralization solution also increases with the same slope. From the data obtained through the test it was able to derive the relationship shown in FIG.

Table 2 and Table 3 below are the results of disinfecting the object using the ballast water treatment system according to the present invention.

Table 2: Results of Treatment with 50 or More Zooplankton

Zooplankton Undissolved Sterilization Survival (cells /) Electrolytic Disinfectant Survival Rate (cells /) International Maritime Organization Standards 20% water level ballast tank 291,738 6 satisfied Ballast Water Tank 40% Level 329,250 2 satisfied Ballast Water Tank 80% Water Level 368,588 3 satisfied

Table 3: Results of Treatment of 10 to 50 Phytoplankton

Phytoplankton Undissolved Sterilization Survival (cells /) Electrolytic Disinfectant Survival Rate (cells /) International Maritime Organization Standards 20% water level ballast tank 1,430 0 satisfied Ballast Water Tank 40% Level 1,591 0 satisfied Ballast Water Tank 80% Water Level 1,256 0 satisfied

As shown in [Table 2] and [Table 3], when applying the ballast water treatment system according to the present invention as well as phytoplankton as well as zooplankton, the International Maritime Organization (IMO) ballast water ballast water treatment regulations All of the results were satisfactory. (Experimental results in Tables 2 and 3 were performed by Korea Maritime Research Institute (KORDI), a KOLAS accreditation body.)

Tables 2 and 3 show the results of treatment of 50 or more zooplankton and 10 to 50 phytoplankton at three levels according to the G8 regulations, because the bioconcentration and type are different for each ballast tank level.

The unelectrolyzed sterilizing water is a ballast water without electrolytic disinfection stored under the same conditions, and compared with the electrolytic sterilized water through the ballast water treatment system according to the present invention.

In the case of zooplankton, surviving individuals were measured by microscopic movement observation. In the case of phytoplankton, microscopic movement and autofluorescence and dyeing of viable cells by staining reagents were observed. The cells were measured.

As shown in Tables 2 and 3, the ballast water treatment system according to the present invention showed remarkable electrolytic sterilization effect in both zooplankton and phytoplankton.

As described above, in the detailed description of the present invention has been described with respect to preferred embodiments of the present invention, those skilled in the art to which the present invention pertains various modifications without departing from the scope of the present invention Of course this is possible. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the equivalents as well as the claims to be described later.

1 is a view that the ballast water flows into the ballast tank of the vessel after sterilization through the electrolytic sterilization module

Figure 2a is a flow chart for determining the abnormality in the machine, apparatus for operation, before operating the ballast electrolytic sterilization module

Figure 2b is a flow chart showing a process in which the ballast water is introduced into the ballast electrolytic sterilization module disinfection

3 is a view showing a process of neutralizing TRO of ballast water and discharging it to the outside of the ship;

Figure 4a is a flow chart showing a process for maintaining the temperature of the TRO neutralizer at an appropriate temperature

Figure 4b is a flow chart showing the process of neutralizing the ballast water containing TRO with the neutralizing liquid supplied from the TRO neutralizer

5 shows a TRO neutralizer for neutralizing TRO of ballast water.

6A and 6B illustrate an electrode module structure according to the present invention.

7 is a graph showing the input amount of the neutralizing solution automatically corresponding to the change in the TRO concentration

8 is a graph of increasing the amount of neutralization solution with increasing TRO concentration

Claims (13)

A ballast inlet for introducing ballast water from the outside; A ballast water electrolytic disinfection module for electrolytic disinfecting ballast water introduced through the ballast inlet; A rectifier for supplying DC power to the electrolytic sterilization module; A control unit for diagnosing ballast water electrolysis or neutralization and controlling operation of the system through signals received from a TRO measuring instrument, a gas sensor, a conductivity sensor, and a leak sensor; A ballast tank storing ballast water electrolyzed through the electrolytic sterilization module; A TRO neutralizer for neutralizing the TRO of the ballast water with a neutralizing liquid when the TRO value measured by the TRO measuring instrument is greater than a predetermined value when discharging the ballast water; And Ballast water treatment system comprising a; ballast discharge unit for discharging the ballast water neutralized through the TRO neutralizer to the outside The method of claim 1, In the electrolytic sterilization module, the electrode shape is formed by matching one-to-one matching of an electrode reaction part having a mesh shape and a plate shape with a current applying part welded to one end of the electrode reaction part in a plate shape, and the electrode is sanded and uniformed. Final 550 ~ 650 of material coated with transition metal with final thickness through etching process to secure roughness and remove surface contaminants, electrode composition manufacturing process, drying and coating process, and annealing or cancilation process. Ballast water treatment system, characterized in that formed by injecting oxygen in the range of 1 ~ 10L / min in the temperature range ℃ 1 hour or more. The method according to claim 1 or 2, In preparing the composition constituting the electrode, RuCl ₃ is used as a main coating agent, TiCl ₄ is used as an additive, butanol is used as a solvent, and the composition ratio before dissolving in a solvent is 30 to 50% of the main coating agent and 50 to additives. Ballast water treatment system, characterized in that configured in the 70% range The method of claim 3, wherein Ballast water treatment system, characterized in that for adjusting the amount of input current to the initial operating conditions of the electrolytic sterilization module by the conductivity of the incoming ballast water. The method of claim 3, wherein The rectifier is a ballast water treatment system, characterized in that to automatically remove the scale generated in the electrode by performing a periodic polarity switching. The method of claim 4, wherein Ballast water treatment system, characterized in that the polarity switching period of the rectifier is within 5 minutes. The method of claim 4, wherein Ballast water treatment system, characterized in that for automatically controlling the electrolytic disinfection module to maintain the concentration of TRO measured by the TRO measuring instrument ballast water passing through the electrolytic disinfection module. The method of claim 4, wherein Ballast water treatment system, characterized in that the TRO concentration of the ballast water passing through the electrolytic disinfection module is 8mg / l to 12mg / l. The method of claim 3, wherein The TRO neutralizer is provided with a neutralization tank, ballast water treatment system comprising a water level control sensor and a temperature control sensor for adjusting the water level and temperature of the neutralized liquid mixed with fresh water and neutralizing material. The method of claim 9, The TRO neutralizer is a ballast water treatment system characterized in that for supplying a neutralized liquid heated by a heater while stirring and mixing fresh water and neutralizing material. The method of claim 9, Ballast water treatment system characterized in that for heating the neutralizing liquid in the temperature range of 25 ℃ to 40 ℃ by the heater of the TRO neutralizer. The method of claim 10, The neutralizing material is at least one of sodium thiosulfate (Na ₂ S ₂ O ₃ , sodium thiosulfate), acidic sodium sulfite (NaHSO ₄ , sodium bisulfate), or sulfite (sulfite). The method of claim 9, The TRO neutralizer is ballast water treatment system characterized in that for supplying the neutralization liquid to the ballast water so that the TRO concentration of the discharged ballast water is maintained to 0.02mg / ℓ or less.

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